What is Aqua commonly called?
Distilled water / Purified water.
What is its function in skincare products?
It dilutes the other ingredients in the product.
It dissolves the other ingredients and brings them all closer together. This enables the ingredients to react with each other and create the product.
It helps the functional ingredients in the product to spread on the skin.
It also improves the overall texture of the product (texture enhancer).
What is its classification?
Its primary classification is as a solvent in skincare products. A solvent is a substance that dissolves another substance. For example, water is a solvent, and salt in the water is a solute.
It is also classified as a texture enhancer.
*classification: ingredients are classified into a group based on their function